[X-ray-star:905] XTE J1858+034 or a new X-ray transient

[maxiweb at maxi.riken.jp]

A new X-ray outburst from XTE J1858+034 or a new X-ray transient is
detected. See also ATel#15970 (M. Nakajima).

=====================
MAXI transient alert
2023-03-31 04:19:29 UT
=====================

[Ground Trigger ID]
ID          :  34124474

[Count Weighted Position]
RA,Dec: (284.942,   3.413)
Galac.: ( 36.924,  -0.302)
Eclip.: (286.640,  25.993)

[Triggered Criteria]
M  :  4d

[Highest Significance]
DPTC  : 1364271561
UT    : 2023/03/31 04:19:29
on    : 4d (Med-band)
sigma : 3.1

[Observed flux]
S :     41 +-    13 mCrab
L :     22 +-    13 mCrab
M :     75 +-    24 mCrab
H :   -253 +-    70 mCrab

nearby(r<5deg) object
=====================
dist  flux  (RA, Dec)        name
[deg][mCrab]  [deg]
=====================
0.25     16.0 (284.69,   3.43)  XTE J1858+034
0.99     69.8 (285.90,   3.19)  4U 1901+03
2.02     25.5 (285.42,   1.45)  XTE J1901+014
2.04     -1.6 (284.18,   5.31)  XTE J1856+053
3.39     52.3 (287.96,   4.98)  SS 433,V1343 Aql
3.92  unknown (282.23,   0.58)  V603 Aql
4.03     -4.6 (287.82,   0.58)  Aql X-1,V1333 Aql
4.29  unknown (283.48,   7.45)  IGR J18539+0727
4.33     55.5 (281.41,   0.89)  GS 1843+00,b 336
4.82    -12.2 (284.76,   8.23)  XTE J1859+083
4.98  unknown (282.51,  -0.94)  Swift J185003.2-005627

[Sun/Moon (RA, Dec)]
Sun :  (9.081, 3.916)
Moon:  (126.112, 24.681)
age: 9.30 day

[Latitude/Longitude]
(24.43N, 122.99E)


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For more information:
 http://maxi.riken.jp/alert/novae/0034124474/0034124474.htm

About MAXI data:
 http://maxi.riken.jp/